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COZY COZY WORLD
I am an ordinary Japanese salaryman in his 50's.
The posts are mostly about my attempts at programming which I have taken up recently to maintain logical thinking.
And a bit about my travels around the country.
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cedarcantab
Jun 1, 20223 min read
Center of Mass of Lamina: Arbitrary Triangle
In the previous post we worked through the calculation of the centroid of an isosceles triangle. In this post we delve into the...
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cedarcantab
May 31, 20221 min read
Center of Mass of Lamina: Isosceles triangle
We will put the learnings of the previous post into practice by applying the principles to a triangle. Center of Mass of a Triangle We...
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cedarcantab
May 28, 20228 min read
Sloped Tile Collision Detection in Phaser 3
Making Characters Climb Sloped Tiles After a long and tortuous journey I finally managed to get CozyPhysics engine to work with partial...
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cedarcantab
May 8, 20223 min read
Understanding 2D Physics Engines with Phaser 3, Part 14: SAT - Capsule vs Capsule
We saw in the previous post that we can use the separating axis theorem to detect collisions between a polygon and circle, the point...
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cedarcantab
Apr 30, 20224 min read
Understanding 2D Physics Engines with Phaser 3, Part 13: SAT - Circle Collision Detection
Circle collision detection using Separating Axis Theorem Where is the projection axis for a circle? As we saw in the previous post, the...
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cedarcantab
Mar 26, 20221 min read
Understanding 2D Physics Engines with Phaser 3, Part 12: SAT - Polygon vs Line Collision Detection
This post will be short. It is about using the separating axis theorem (SAT) to detect collision between polygon and line segments. Just...
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cedarcantab
Mar 25, 20222 min read
Understanding 2D Physics Engines with Phaser 3, Part 11.3: SAT - Containment
In the prior post I talked about how to generate a minimum translation vector, which allowed us to push objects around by forcing...
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cedarcantab
Mar 23, 20226 min read
Understanding 2D Physics Engines with Phaser 3, Part 11.1: SAT - Convex Polygon Collision Detection
Collision Detection between Polygons with Separating Axis Theorem Phaser provides methods to detect overlap / collision between triangles...
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cedarcantab
Mar 21, 20225 min read
Understanding 2D Physics Engines with Phaser 3, Part 9: Capsule to Capsule Collision and Resolution
Capsules Phaser 3's default arcade physics engine handles physics bodies as either rectangles (AABB only) or circles. It appears that in...
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cedarcantab
Mar 14, 20223 min read
Understanding 2D Physics Engines with Phaser 3, Part 8: Triangle Collisions
Triangle vs Triangle Collision Detection with Rotation In a prior post I took a quick look at GetRectagleToRectangle method of Phaser's...
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cedarcantab
Mar 10, 20224 min read
Understanding 2D Physics Engines with Phaser 3, Part 7: Rotation
Rotation in a plane So far we have dealt with circles and axis-aligned boxes. Collision detection, resolution and response becomes...
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cedarcantab
Mar 7, 20229 min read
Understanding 2D Physics Engines with Phaser 3, Part 6: Rectangle Collision Detection & Resolution
Axis Aligned Rectangle Collision Detection and Resolution Having worked through the logic of collision detection between circles and...
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cedarcantab
Feb 28, 20226 min read
Understanding 2D Physics Engines with Phaser 3, Part 5: Circle vs Line Collisions
Handling collisions between Circle and Line We covered the topic of colliding circles against axis aligned lines. In this post we cover...
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cedarcantab
Feb 22, 20225 min read
Understanding 2D Physics Engines with Phaser 3, Part 4: Circle Collision Response with Mass
Collision Response in Circle2Circle with mass In the previous post I developed the crudest form of collision response; that of two...
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cedarcantab
Feb 15, 20225 min read
Physics Simulation in Javascript: Circle2Circle Collision Response (Bounce)
Circle vs Circle Collision Response In the previous post I covered: detecting collisions (strictly speaking, overlap) between two...
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cedarcantab
Feb 9, 20224 min read
Physics Simulation in Javascript: Circle to Circle Collision Resolution
Resolution of collisions between two circles In the previous post we discussed how to assess whether two circles are colliding, or...
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cedarcantab
Feb 7, 20223 min read
Physics Simulation in Javascript: Circle to Circle Collision Detection
Collision Detection and Collision Resolution between 2 Circles One of the core functions of a physics engine is of course to detect when...
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cedarcantab
Jan 31, 20224 min read
Understanding 2D Physics Engines with Phaser 3, Part 1.5: Rotation Matrix
There is one special type of matrix that will come up time and time again, particularly we start to deal with rotating bodies; that is...
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cedarcantab
Jan 29, 20223 min read
Understanding 2D Physics Engine with Phaser 3, Part 1.3: The Cross Product
The Cross Product Some mathematicians will tell you that the vector cross product does not exist in 2D. If you search for a wiki page on...
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